Apparatus for giving drafts to cotton slivers



Nov. 23, 1931. K. HONDA I 2,100,139 v APPARATUS FOR GIVING DRAFTS TO COTTON SLIVERS Filed Oct. 30, 1935 50 top rollerswhen it is required. o

" 'I'his known apparatus has several drawbaclni.

Patented 23, 193.1

APPARATUS Fon GIVING n aarrs 'ro ,corron snrvnas Kikutaro Honda, Osaka, Japan 7 Application October so, 193's,

Serial No. 47,493"

InJapanJanuary lZ, 1935 2 Claims.- (01. 19-131) r This invention relates to improvements in an apparatus for giving drafts to cotton, slivers for spinning yarns, particularly to an, apparatus wherein}. sliver is drafted between 'a pair of small endless belts passing on a pair of middle rollers of a spinning frame. v

. Known apparatus includes a pair of small endless belts extended on top and bottom, middle rollers,'and tensers provided between front and back rollers, a sliver being drawn between the middle and the front rollers, slightly pressed by I An object of this invention is to obtain an apparatus wherein a'cradle is detachably fixed the pair of belts.

In such an apparatus, a cradle on which tensers, thetop roller and the belts are mounted,

is-generally-ridden'on the bottom roller which is kept in journals ona roller-stand of a spinning frame. As a rule, six or eight bottom rollers are made in one piece, allthe rollers being made of fluted portions cut out from a continuous 0 steel ban-while two adjacent middle top roll ers are made in one piece, and a springpr a weight is applied to the top rollers at the portion between the two adjacent ones in order to. give a pressure to the slivers which are passing with 25 the belts on-the top and bottom rollers.

a'sliver is newly passed between the belts or the surfaces of thebelts are tobe cleaned, thesprlng or weight on the top rollers is at first slacked, and the tensers are drawn out from the cradle B0 so that the top and bottom belts hang on the .top and bottom rollers, respectively, and then the'cradleisfiemoved with the twin top.rollers I mounted thereon, leaving the bottom rollers placed onthe roller-stand.

-- not only to tension the belts but also to determine awidth of the clearance between the top and'bottom belts at their front end. The efllciency of draft being largely dependent on this width of clearance, the top and bottom tensers I r both belts slack their tensions.

.The pressure acting on the twin top rollers is.

exerted by means of a spring or a weight as beforerrrentioned, which; isprovided beneath* the roller-stand through levers and a means is also provided accompanying therewith for applying and from theand withdrawing the pressure-to The construction is complicated due to existence of the pressure applying and withdrawing means for ,the top, rollers: The endless belts are always 55 slackcd, when ,their surfaces are to be cleaned:

In case In this kindv of apparatus, the tensers serve.

the cradle are being Twoadjacent having top rollers, to and from which is simultaneously applied and removed the working pressure, so that an interrup'tion of work for one unit inevitably necessltates an interruption of work of the adjacent 5 one: The necks of the bottom roller whereon the lower edge of a cradle are supported is abrased in course of time, and the cradle. is vibrated so that the silver may beun'evenly drafted. These drawbacks can be satisfactorily 1o avoided by the present invention.

.' separated pieces of the cradle can be again set up in an operable trouble. r f

' Another object of thisinvention isto obtain an apparatus wherein no pressure-applying means is required outside the cradle, and when the divided cradle is built up, an adequate pressure is simultaneously applied to the top roller by means of springs provided in the cradle.

. The invention is described in detail referring to the attached drawing. 4 r 3 Fig. 1, is an elevation 01. an apparatus accordcondition without further ing to the invention. Fig. 2 is a part sectional plan view. Figs. 3 and 4are sectional elevations on the lines'III-JH and IV-'-IV of Figs} Land 3, respectively. Fig. 5 is an "end elevation of the 85 apparatus when the top and bottom pieces of I I half interlocked or separated.

.-In the drawing, Ia and lb are back-top and bottom rollers, 2a and 2b are middle top-and are ordinarily made in one piece as an u sliape bottom rollers, and. 3a and 3b are front top and so that when itis drawn out from the cradle, bottom rollers, -respectively. hand 5.are tensers for .tensioningendless belts 6 and 'l, which pass around the rollers 2a. and 212. respectively. I

YThe middle top roller 2a and tensers 4 and v are mounted on 'a-cradle 8, which is'dividedinto N two pieces, an upper plece-. Ba and a lowerpiece 8b. I J

The upper and lower pieces of the cradle have an interlocking means along their facing edges. 0

The means may be made in various constructions, for example, recesses on'one piece. and

' spring-rkeys onthe other piece co-operative with e the recesses provided along the edge of each piece; or the co-operating edges may be made M .ing, the interlocking means consists of two projections 0 and 0a provided along the upper edgeof each side of the bottom piece and' two irregular recesses l0 and Ila. provided along the lower edge 015 each side of the upper piece. In case the upper piece is'to-be interlocfied with the lower one,"the upper piece is at first en a ed with the cesses' "la as shown in Fig. 5; and the'upper-one is turned downwards until theqther projection 9 is entered into the other'recess l0. Thenvthe upper piece is slid forward alittle sothat both projections engage with the-recesses as shown in;

5 Each side 01' the top piece of the. cradle is provided with two inward projections ii and II. A spring i3 is fixed to the wall of the cradle at each side of the upper piece, and extends downwards passing throughthe clearance between the top side oilthe cradle and the proiection ll, its free end. being curved frontward and backward facing to the projection l2, so that a recess for holding each end of the top I rollers axle is formed between them. By' this means each end of the top rollers axle is yieldingly held ln the position by the spring which, on the other hand, presses the axle downward co-operating with the proiecti'om l2, so that no spring or weight is'required to I applied to the top roller in order to obtain an adequate pressure. Inother words, as spon as the upper and lower pieces of the cradle are interlocked, the apparatus is ready for operation without requir- .i any further steps.

) 8 top tenser 4 is held in a hole perforated on each side of the upper piece or the cradle,

while .the bottom tenser 5 is fittedfto a recess provided on the upper \edge oi! the lower piece, and is kept in its positionby the lower edge or the upper piece when the latter is interlocked with the, lower one as shown in Figs 1.'

'lhe bottom piece or the cradle is detachably fixed to abar II which ls flx'ed to therollerstand or the frame ofthe machine, and the lower edge oi the'cradle does not touch the 'suriace o! the bottom roller. I

The bar I4 is provided with a spring l5 me each dradleiand. another spring lia. provided at the lower end of the bar is bent upward to make a space for receiving the lower end of the piece 811.- ,A' key IQ is'flxed at the upper part of the spring, which his to a hole I! perforated in the back wall of the lower piece when the lower piece" ispushed dawn over the bottom .roller 2b,

gioo'nae lower piece 01-. the

theback wall is flrm'ly ilxed'lto the means or the 81 1118 lie and the key While the top-roller ismade.

- each unit, six or eight bottom, 1QllersQare made on'one piece as usual. The lower belt I passes 6' over'the bottom roller, and ltslront end is stretched bydhe'bottom tenser I while the upper belt 6 is also extended between the andthe top tenser l, and afeotton'sliver it Each unit can be stopped lndep'ende'ntlyo! -the other unit 1 In case the surface of fthe are be cleaned or a new silver is tobe inserted between 1 ,the belts, the upper piece 0! the. cradleds disengaged irom thebottom'one in the reversed way to that torinterlocklng before mentioned. Both endless belts are now exposed, of them is still extended over its roller mounted on the upper and lower pieces 6! the cradle, respectively. L

The top roller can be easily from the top piece of. the cratlle,v if desired. .by' forcibly .order to press the top roller downwards, a means provided on the lowerpi'e'ce of the cradle so as to passes the clearance. between the two. belta lo lower one at one of-the projections 90. and re upper and lowerb c e and-rr detachably fix. the to the ml the 35.

machine, and a lowertenserinserted in a recess provided on each side ol the upper edge oi thetion by-the loweredge cradle when the uppe eee the lower one.

v 2. An apparatus 1 silver ,for spinning yarns divided into upper and lower pieces and. provi with, an of the meansprovided on the lower piece or soasto detachablyflxthepleceto the machine, an ind pendent top roller ingly held inthe upper MG spring each side of the upper'piecept the press the top roller. downwards with its bent in such a manner asto yielding]; axle e v v the Egg.

.cradleflrnily heldinitsposifitheupperpieeedthe isinterloekedwlthld or-sivint eom'ptislng a cradle being constructed andarranged to form one 0! a series of cradles serving a common bottomroller. 

